Global plug-in light duty vehicle (PEV) sales increased by about 80% in 2015 to 565,668 units, according to figures compiled by Argonne National Laboratory and posted by the US Energy Information Administration (EIA).

PEV sales in the US declined by 3% to 115,262 units (20% global share); however, sales in China more than doubled to 214,283 units, surpassing all other countries in the number of PEVs sold.

Western Europe as a whole had the second highest volume of PEV sales in 2015 and saw an increase of 80% over 2014.

Though Japan and Canada had lower sales of PEVs by volume, they both had significant increases in PEV sales from the previous year. These reported countries/regions account for about 95% of global PEV sales.

Comments

US needs taxation on oil stabilizing long term oil prices. If americans do not like pay to their own government they will pay to foreign governments which predomenantly will spend those oil money simply on guns and terorists. Best example is Russia with it's $85 bn military budget exclusively financed from oil sales.
Low petrol prices leading to loss of consumer interest to sustanable transportation means. Is it fair increasing taxation on one particular energy source? IMO it is fair until we will have diversification of energy source for transportation and oil monopoly will be eliminated.
Enviromental benefits are secondary issues but might be taken into account as well.

In China many cities has quotas on how many new combustion vehicles that are allowed to register each year with exception for plug-ins. That drives sales of PHEVs a lot. If the only car you can register is a plug-in there is a huge market for them regardless of subsidies and their higher prices. It is a much better way to regulate as it does not involve the taxpayers’ money and the desired outcome is obtained.

There is also a perfectly good alternative to cars and that is bicycles. All cities, small or large, should invest heavily in better infrastructure for bicycles. Most roads for cars should also have bicycle lanes. Bicycles solve too major problems at once. It is pollution free and provides much needed exercise for people. In Copenhagen the capital of Denmark over 50% of the population ride a bike to work every day. It is a large part of the reason for Denmark being the happiest people in the world in many surveys of happiness. And people who can otherwise not ride a bike can often ride an electric bike.

So, despite
+ much cheaper fuel price to consumers
+ a much larger fraction of privately-owned large work vehicles that still fit into the LDV category
+ much more stringent regulation (and consumer rejection) of NEV-type vehicles that comprise a large number of the non-US plug-in fleet
+ generally stupid and mean-spirited coal-rolling racist Americans who hate all the rest of you and are trying to destroy Tesla through the Koch brothers (I know 'cause I read it in EV blogs all the time)

... the percentage of US PHEV share is remarkably aligned with a predictable fraction of total PHEV uptake.